def test_multiline_message(self):
# these messages caused issue #3
msg_1_part_0 = b'!AIVDM,2,1,1,A,538CQ>02A;h?D9QC800pu8@T>0P4l9E8L0000017Ah:;;5r50Ahm5;C0,0*07'
msg_1_part_1 = b'!AIVDM,2,2,1,A,F@V@00000000000,2*35'
assert NMEAMessage.assemble_from_iterable(
messages=[NMEAMessage(msg_1_part_0),
NMEAMessage(msg_1_part_1)]).decode().to_json()
msg_2_part_0 = b'!AIVDM,2,1,9,A,538CQ>02A;h?D9QC800pu8@T>0P4l9E8L0000017Ah:;;5r50Ahm5;C0,0*0F'
msg_2_part_1 = b'!AIVDM,2,2,9,A,F@V@00000000000,2*3D'
assert NMEAMessage.assemble_from_iterable(
messages=[NMEAMessage(msg_2_part_0),
NMEAMessage(msg_2_part_1)]).decode().to_json()
def test_msg_type_21(self):
msg = NMEAMessage.assemble_from_iterable(messages=[
NMEAMessage(
b"!AIVDM,2,1,7,B,E4eHJhPR37q0000000000000000KUOSc=rq4h00000a,0*4A"
),
NMEAMessage(b"!AIVDM,2,2,7,B,@20,4*54")
]).decode()
assert msg['type'] == 21
assert msg['mmsi'] == "316021442"
assert msg['aid_type'] == NavAid.REFERENCE_POINT
assert msg['name'] == "DFO2"
assert msg['accuracy'] == 1
assert round(msg['lat'], 2) == 48.65
assert round(msg['lon'], 2) == -123.43
assert not msg['to_bow']
assert not msg['to_stern']
assert not msg['to_port']
assert not msg['to_starboard']
assert msg['off_position']
assert msg['regional'] == 0
assert msg['raim']
assert msg['virtual_aid'] == 0
assert msg['assigned'] == 0
assert msg['name_extension'] == ""
def test_msg_type_17(self):
msg = NMEAMessage.assemble_from_iterable(messages=[
NMEAMessage(
b"!AIVDM,2,1,5,A,A02VqLPA4I6C07h5Ed1h<OrsuBTTwS?r:C?w`?la<gno1RTRwSP9:BcurA8a,0*3A"
),
NMEAMessage(b"!AIVDM,2,2,5,A,:Oko02TSwu8<:Jbb,0*11")
]).decode()
n = 0x7c0556c07031febbf52924fe33fa2933ffa0fd2932fdb7062922fe3809292afde9122929fcf7002923ffd20c29aaaa
assert msg['type'] == 17
assert msg['repeat'] == 0
assert msg['mmsi'] == "002734450"
assert msg['lon'] == 17478
assert msg['lat'] == 35992
assert msg['data'] == n
msg = NMEAMessage(
b"!AIVDM,1,1,,A,A0476BQ>J8`<h2JpH:4P0?j@2mTEw8`=DP1DEnqvj0,0*79"
).decode()
assert msg['type'] == 17
assert msg['repeat'] == 0
assert msg['mmsi'] == "004310602"
assert msg['lat'] == 20582
assert msg['lon'] == 80290
assert msg[
'data'] == 14486955885545814640451754168044205828166539334830080
def _assemble_messages(self):
queue = []
for line in self._iter_messages():
# Try to parse the message
try:
msg = NMEAMessage(line)
except Exception as e:
raise ValueError(f'Failed to parse line "{line}"') from e
# Be gentle and just skip invalid messages
if not msg.is_valid:
continue
if msg.is_single:
yield msg
# Assemble multiline messages
elif msg.is_multi:
queue.append(msg)
if msg.index == msg.count:
yield msg.assemble_from_iterable(queue)
queue.clear()
else:
raise ValueError("Messages are out of order!")
def test_message_assembling(self):
multi = NMEAMessage.assemble_from_iterable(messages=[
NMEAMessage(b"!AIVDM,2,1,4,A,55O0W7`00001L@gCWGA2uItLth@DqtL5@F22220j1h742t0Ht0000000,0*08"),
NMEAMessage(b"!AIVDM,2,2,4,A,000000000000000,2*20")
])
assert not multi.is_single
assert multi.is_multi
assert multi.is_valid
def test_msg_type_5(self):
msg = NMEAMessage.assemble_from_iterable(messages=[
NMEAMessage(b"!AIVDM,2,1,1,A,55?MbV02;H;s<HtKR20EHE:0@T4@Dn2222222216L961O5Gf0NSQEp6ClRp8,0*1C"),
NMEAMessage(b"!AIVDM,2,2,1,A,88888888880,2*25")
]).decode()
assert msg['callsign'] == "3FOF8"
assert msg['shipname'] == "EVER DIADEM"
assert msg['shiptype'] == ShipType.Cargo
assert msg['to_bow'] == 225
assert msg['to_stern'] == 70
assert msg['to_port'] == 1
assert msg['to_starboard'] == 31
assert msg['draught'] == 12.2
assert msg['destination'] == "NEW YORK"
def test_msg_type(self):
"""
Test if msg type is correct
"""
nmea = NMEAMessage(b"!AIVDM,1,1,,B,15M67FC000G?ufbE`FepT@3n00Sa,0*5C")
assert nmea.decode().msg_type == AISType.POS_CLASS_A1
nmea = NMEAMessage(b"!AIVDM,1,1,,B,15NG6V0P01G?cFhE`R2IU?wn28R>,0*05")
assert nmea.decode().msg_type == AISType.POS_CLASS_A1
nmea = NMEAMessage.assemble_from_iterable(messages=[
NMEAMessage(b"!AIVDM,2,1,4,A,55O0W7`00001L@gCWGA2uItLth@DqtL5@F22220j1h742t0Ht0000000,0*08"),
NMEAMessage(b"!AIVDM,2,2,4,A,000000000000000,2*20")
])
assert nmea.decode().msg_type == AISType.STATIC_AND_VOYAGE
